Tro•Jbleshooting
•
Keyboard controller
•
CMOSRAM
•
ROM
BIOS
(checksum)
• Programmable Interrupt Timer (PIT)
• DMA controller
•
Base
64
KB
system
RAM
• Cache conttolier
Peripheral
Hardware
Tests
The first peripheral
hardware
test procedure verifies that
the
system
configuration data stored in
CMOS
RAM
matches
the
hardwart present.
Then,
the
procedures continue
to
test
and
initialize other peripheral
hardware. A test failure generally results in an error message
on
the monitor
screen. The following list identifies the peripheral hardware tests
and
their
order
of
execution:
•
CMOS
RAM
configuration data
• RAM memory above
64
KB
• Keyboard
• SeriaVparallel interface circuitry
• Floppy disk controller
•
Hard
disk controller
• Intelligent graphics controller
2-4
DECpc
433
Workstation Service
Guide
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